CN110862782B - Flexible OLED supports uses protection film sticky tape - Google Patents
Flexible OLED supports uses protection film sticky tape Download PDFInfo
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- CN110862782B CN110862782B CN201911172193.8A CN201911172193A CN110862782B CN 110862782 B CN110862782 B CN 110862782B CN 201911172193 A CN201911172193 A CN 201911172193A CN 110862782 B CN110862782 B CN 110862782B
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- C09J—ADHESIVES; NON-MECHANICAL ASPECTS OF ADHESIVE PROCESSES IN GENERAL; ADHESIVE PROCESSES NOT PROVIDED FOR ELSEWHERE; USE OF MATERIALS AS ADHESIVES
- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
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- C09J11/00—Features of adhesives not provided for in group C09J9/00, e.g. additives
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- C09J133/00—Adhesives based on homopolymers or copolymers of compounds having one or more unsaturated aliphatic radicals, each having only one carbon-to-carbon double bond, and at least one being terminated by only one carboxyl radical, or of salts, anhydrides, esters, amides, imides, or nitriles thereof; Adhesives based on derivatives of such polymers
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
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- C09J7/00—Adhesives in the form of films or foils
- C09J7/20—Adhesives in the form of films or foils characterised by their carriers
- C09J7/22—Plastics; Metallised plastics
- C09J7/25—Plastics; Metallised plastics based on macromolecular compounds obtained otherwise than by reactions involving only carbon-to-carbon unsaturated bonds
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- C08K—Use of inorganic or non-macromolecular organic substances as compounding ingredients
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- C09J2301/00—Additional features of adhesives in the form of films or foils
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- C09J2301/00—Additional features of adhesives in the form of films or foils
- C09J2301/30—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier
- C09J2301/312—Additional features of adhesives in the form of films or foils characterized by the chemical, physicochemical or physical properties of the adhesive or the carrier parameters being the characterizing feature
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- C09J2433/00—Presence of (meth)acrylic polymer
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- C09J2479/00—Presence of polyamine or polyimide
- C09J2479/08—Presence of polyamine or polyimide polyimide
- C09J2479/086—Presence of polyamine or polyimide polyimide in the substrate
Abstract
The invention relates to a protective film adhesive tape for flexible OLED support, which sequentially comprises a first base material layer, an antistatic acrylic pressure-sensitive adhesive protective layer, an antistatic polyacrylic resin hardened layer, a second base material layer, a special polyacrylic adhesive layer and a PET double-sided antistatic ionotype film layer from top to bottom. The adhesive tape has excellent bonding effect, and can effectively prevent the risk of device damage caused by insufficient adhesive property of the adhesive tape in the process of heating of an OLED device in use or thermal disassembly of a mobile phone screen; meanwhile, the adhesive tape adopts a PET substrate with a certain thickness, bending-resistant hardening treatment is carried out on the surface of the substrate, so that the adhesive tape can adapt to bending of the flexible OLED at different angles, the stiffness of the whole component is ensured after the device is attached, and the component is prevented from being damaged; through the antistatic treatment of the hardened layer, the antistatic treatment of the surface acrylic acid protective layer and the double-sided antistatic treatment of the release film, the excellent antistatic effect of the adhesive tape during use is ensured.
Description
Technical Field
The invention belongs to the technical field of bonding materials, and particularly relates to a protective film adhesive tape for a flexible OLED support.
Background
An Organic Light-Emitting Diode (OLED) has many advantages of self-luminescence, full solid state, wide viewing angle, thin thickness, fast response, and the like, and has a great application prospect in flat panel display. With the rapid development of electronic products such as display technology, personal wearing, folding screen mobile phones, 3D large arc screen mobile phones and the like, the flexible OLED display device is more and more widely applied. In the existing flexible OLED manufacturing process, a high molecular polymer (PI slurry) is used as a flexible substrate on a rigid substrate (such as a glass substrate), and then an OLED electrode and a light emitting structure are manufactured on the flexible substrate. After all manufacturing processes are completed, the rigid substrate is separated from the flexible substrate. The manufactured OLED device has certain flexibility and risks of pollution, breakage, fragmentation and the like in the processes of transportation and assembly. In the traditional acrylic adhesive tape, the cohesion is deteriorated to cause viscosity reduction in a high-temperature environment, and the traditional screen repairing and disassembling process of the mobile phone is usually carried out by heating to 80-100 ℃. Meanwhile, the heating problem of the current mobile phone is serious in the using process, and the internal temperature can reach about 70 ℃. There is a risk of damage to the handset if the adhesive tape becomes less tacky at higher temperatures. After the flexible OLED device is peeled off from the rigid substrate, the surface is fragile, and the adhesive tape is required to be attached to play a role in protecting, supporting and fixing, and if the common high-viscosity adhesive tape is used for attaching the protective film, the cohesive deterioration of the adhesive tape can cause the viscosity to be reduced under the high-temperature environment, so that the attachment performance of the product is influenced. The solution of high temperature resistance of the adhesive tape on the market is realized by increasing cohesion, which results in that the viscosity of the adhesive tape can not reach a high viscosity level.
Therefore, it is necessary to develop a flexible protective film tape for OLED support.
Disclosure of Invention
The invention aims to provide a protective film adhesive tape for supporting a flexible OLED, and solves the technical problems.
The technical scheme adopted by the invention for solving the technical problems is as follows: providing a protective film tape for flexible OLED support: from last down be first substrate layer, antistatic acrylic acid pressure sensitive adhesive protective layer, antistatic polyacrylic resin sclerosis layer, second substrate layer, special polyacrylic adhesive layer and the two-sided antistatic ionosphere rete of PET in proper order, the thickness of first substrate layer is 25-75 mu m, the thickness of antistatic acrylic acid pressure sensitive adhesive protective layer is 5-15 mu m, the thickness on antistatic polyacrylic resin sclerosis layer is 1 mu m-3 mu m, the thickness of second substrate layer is 50-100 mu m, the thickness of special polyacrylic adhesive layer is 15-35 mu m, the thickness on the two-sided antistatic ionosphere rete of PET is 25-75 mu m.
As a preferred embodiment of the invention, the antistatic acrylic pressure-sensitive adhesive protective layer comprises 100 parts of acrylate adhesives, 0.5-2.0 parts of isocyanate curing agents, 0.1-1.0 part of imine lithium salts and 20-50 parts of organic solvents.
As a preferred embodiment of the present invention, the acrylate adhesive is a low molecular weight polymeric acrylate adhesive; the isocyanate curing agent is any one or more of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate; the imide lithium salt comprises bis (trifluoromethyl) sulfonyl imide lithium; the organic solvent comprises any one or a combination of ethyl acetate, n-butyl acetate, toluene and butanone.
As a preferred embodiment of the present invention, the antistatic polyacrylic resin hardened layer includes 40 to 80 parts by weight of a solvent, 20 to 60 parts by weight of a resin, 0.3 to 1 part by weight of a photoinitiator, and 0.1 to 0.5 part by weight of a conductive high molecular polymer.
As a preferred embodiment of the present invention, the solvent includes any one or a combination of ethyl acetate, n-butyl acetate, toluene, MIBK, or PGM; the resin comprises polyurethane modified acrylic resin or polyester modified polyacrylic resin; the photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl acetone and/or 1-hydroxycyclohexyl phenyl ketone; the conductive high molecular polymer is a polythiophene polymer.
In a preferred embodiment of the invention, the second substrate layer is an optical PET film or PI film, the transmittance is greater than or equal to 90%, and the haze is less than 2%.
The present invention also provides a pressure-sensitive adhesive tape, comprising: the special polyacrylic adhesive layer comprises 20-50 parts of organic solvent, 100 parts of acrylate adhesive, 5-15.0 parts of tackifying resin, 0.5-2.0 parts of isocyanate curing agent and 0.5-3.0 parts of closed isocyanate curing agent.
As a preferred embodiment of the invention, the organic solvent comprises any one or a combination of ethyl acetate, n-butyl acetate, toluene and butanone; the acrylate adhesive comprises an acrylate copolymer with carboxyl or hydroxyl, and is formed by polymerizing monomers of ethyl acrylate, butyl acrylate and isooctyl acrylate, and the molecular weight of the acrylate adhesive is 30-50 ten thousand; the tackifying resin comprises modified rosin resin with active carboxyl and double bonds; the closed isocyanate curing agent comprises a closed material and an isocyanate curing agent, wherein the closed material is any one or more of acetanilide, epsilon-caprolactam and methyl ethyl ketoxime; the isocyanate curing agent is any one or more of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate.
As a preferred embodiment of the invention, the surface impedance value of the PET double-sided antistatic ion type film layer is 106-109Ω。
As a preferred embodiment of the invention, the preparation method comprises the following steps:
(1) mixing 20-50 parts of organic solvent, 100 parts of acrylate adhesive, 5-15.0 parts of tackifying resin, 0.5-2.0 parts of isocyanate curing agent and 0.5-3.0 parts of enclosed isocyanate curing agent, and coating the mixture on one surface of a second substrate layer to obtain a special polyacrylic acid adhesive layer;
(2) mixing 40-80 parts by weight of solvent, 20-60 parts by weight of resin, 0.3-1 part by weight of photoinitiator and 0.1-0.5 part by weight of conductive high polymer, and coating the mixture on the other surface of the second substrate layer to obtain an antistatic polyacrylic resin hardened layer;
(3) coating 100 parts of acrylate adhesive, 0.5-2.0 parts of isocyanate curing agent, 0.1-1.0 part of imine lithium salt and 20-50 parts of organic solvent on the non-binding surface of the antistatic polyacrylic resin hardened layer to obtain an antistatic acrylic pressure-sensitive adhesive protective layer;
(4) attaching a first substrate layer to the non-attaching surface of the antistatic acrylic pressure-sensitive adhesive protective layer;
(5) attaching the non-attaching surface of the special polyacrylic acid adhesive layer to the PET double-sided antistatic ionotype film layer to prepare the protective film adhesive tape for supporting the flexible OLED
The invention discloses a protective film adhesive tape for a flexible OLED support, which has the advantages that: have excellent viscidity under normal atmospheric temperature, the product lasts the crosslinking and promotes viscidity under high temperature, has more outstanding bonding effect, can effectively prevent to bring the risk of harm because of high temperature viscidity inadequately behind the laminating flexible OLED device. Meanwhile, the surface hardening treatment of the base material of the protective film adhesive tape has a better supporting effect on the whole part, and the static electricity prevention treatment of each layer of the adhesive tape avoids the risk of damage to the part caused by static electricity.
Drawings
Fig. 1 is a schematic cross-sectional structure diagram of a protective film tape for supporting a flexible OLED according to the present invention, wherein 1 is a first substrate layer, 2 is an antistatic acrylic pressure sensitive adhesive protective layer, 3 is an antistatic polyacrylic resin hardened layer, 4 is a second substrate layer, 5 is a special polyacrylic adhesive layer, and 6 is a PET double-sided antistatic ionogenic film layer.
Detailed Description
As shown in figure 1, the invention provides a protective film adhesive tape for supporting a flexible OLED, which comprises a first substrate layer 1 with the thickness of 25-75 microns, an antistatic acrylic pressure-sensitive adhesive protective layer 2 with the thickness of 5-15 microns, an antistatic polyacrylic resin hardened layer 3 with the thickness of 1-3 microns, a second substrate layer 4 with the thickness of 50-100 microns, a special polyacrylic adhesive layer 5 with the thickness of 15-35 microns and a PET double-sided antistatic ionized film layer 6 with the thickness of 25-75 microns. The first substrate layer 1 is an optical PET film: the transmittance is more than or equal to 90 percent, and the haze is less than 2 percent; the antistatic acrylic pressure-sensitive adhesive protective layer 2 is prepared from 100 parts of an acrylate adhesive, 0.5-2.0 parts of an isocyanate curing agent, 0.1-1.0 part of imine lithium salt and 20-50 parts of an organic solvent, wherein the acrylate adhesive is a low-molecular-weight polymerized acrylate adhesive and has low viscosity and good wettability, the isocyanate curing agent is at least one of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate, the imine lithium salt is mainly bis (trifluoromethyl) sulfonyl imide lithium, the surface resistance of the adhesive can be effectively reduced, the antistatic effect is improved, and the organic solvent comprises one or a combination of more of ethyl acetate, n-butyl acetate, toluene and butanone; the antistatic polyacrylic resin hardened layer 3 comprises 40-80 parts by weight of solvent, 20-60 parts by weight of resin, 0.3-1 part by weight of photoinitiator and 0.1-0.5 part by weight of conductive high polymer, wherein the resin comprises polyurethane modified acrylic resin or polyester modified polyacrylic resin and has excellent flexibility, the photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl acetone and/or 1-hydroxycyclohexyl phenyl ketone, the conductive high polymer is mainly polythiophene polymer, and the solvent comprises one or a combination of more of ethyl acetate, n-butyl acetate, toluene, MIBK and PGM; the second substrate layer 4 is an optical PET film orPI film, the transmittance is more than or equal to 90 percent, and the haze is less than 2 percent; the special polyacrylic adhesive layer 5 comprises 20-50 parts of an organic solvent, 100 parts of acrylate adhesive, 5-15.0 parts of tackifying resin, 0.5-2.0 parts of isocyanate curing agent and 0.5-3.0 parts of closed isocyanate curing agent, wherein the organic solvent comprises one or a combination of more of ethyl acetate, n-butyl acetate, toluene and butanone, the acrylate adhesive comprises an acrylate copolymer with carboxyl or hydroxyl, the acrylate adhesive is mainly formed by polymerizing monomer ethyl acrylate, butyl acrylate and iso-acrylate, the molecular weight is about 30-50 ten thousand, the tackifying resin mainly refers to rosin resin, the modified rosin resin has active carboxyl and double bonds and has stronger reactivity, and can participate in esterification, decarboxylation and other reactions in the acrylate adhesive, so that the cohesive property (cohesive property) and water resistance of the adhesive can be effectively improved, and the isocyanate curing agent is toluene diisocyanate, and the adhesive can be used for preparing the adhesive, At least one of isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexyl methane diisocyanate, wherein the blocked isocyanate curing agent is an isocyanate curing agent blocked by at least one of acetanilide, epsilon-caprolactam, methyl ethyl ketoxime and the like, and can participate in an adhesive curing reaction after being deblocked at different temperatures; the surface impedance value of the PET double-sided antistatic ion type film layer 6 is 106-109Ω。
The preparation method of the structure comprises the following steps:
mixing the raw materials of the special polyacrylic acid glue layer 5, and coating the mixture on one surface of the second base material layer 4 in a Slot-die/CED/scraper coating mode and the like to obtain the special polyacrylic acid glue layer 5;
mixing the raw materials of the antistatic polyacrylic resin hardened layer 3, and coating the mixture on the other surface of the second base material layer 4 in a micro-concave coating mode to obtain the antistatic polyacrylic resin hardened layer 3;
coating the raw material of the first antistatic acrylic pressure-sensitive adhesive protective layer 2 on the non-adhered surface of the antistatic polyacrylic resin hardened layer 3 in a Slot-die coating mode and the like to obtain the antistatic acrylic pressure-sensitive adhesive protective layer 2;
a first substrate layer 1 is attached to the non-attaching surface of the antistatic acrylic pressure-sensitive adhesive protective layer 2,
and (3) attaching the PET double-sided antistatic ionotype film layer 6 to the non-attaching surface of the special polyacrylic adhesive layer 5 to prepare the protective film adhesive tape for supporting the OLED.
The present invention will be further described with reference to specific examples, but the scope of the present invention is not limited to these examples.
Example 1
The protective film adhesive tape for the flexible OLED support is of a multilayer structure and comprises a 25-micrometer optical PET film of a first base material layer, a 5-micrometer antistatic acrylic pressure-sensitive adhesive protective layer, a 1-micrometer antistatic polyacrylic resin hardened layer, a 50-micrometer optical PET film of a second base material layer, a 15-micrometer special polyacrylic adhesive layer and a 25-micrometer double-sided antistatic ionogenic film layer.
The special polyacrylic acid adhesive layer comprises the following raw materials in percentage by mass: 100 parts of acrylate adhesives, 5 parts of rosin tackifying resin, 0.5 part of 2, 6-toluene diisocyanate curing agent, 0.5 part of acetanilide enclosed isocyanate curing agent and 30 parts of organic solvent ethyl acetate.
The antistatic polyacrylic resin hardened layer is a bending-resistant antistatic polyacrylic resin hardened layer. The antistatic polyacrylic resin hardened layer comprises the following raw materials: 40 parts by weight of a solvent, 20 parts by weight of a resin, 0.3 part by weight of a photoinitiator, and 0.1 part by weight of a conductive high molecular polymer; the resin comprises polyurethane modified acrylic resin; the photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl acetone; the solvent comprises n-butyl acetate.
The antistatic acrylic pressure-sensitive adhesive protective layer comprises the following raw materials in percentage by mass: 100 parts of low-viscosity acrylate adhesive; 0.5 part of 2, 6-toluene diisocyanate curing agent, 0.1 part of lithium bis (trifluoromethyl) sulfonyl imide and 20 parts of organic solvent ethyl acetate.
Example 2
The protective film adhesive tape for the flexible OLED support is of a multilayer structure and comprises a first substrate layer 50-micron optical PET film, a 10-micron antistatic acrylic pressure-sensitive adhesive protective layer, a 2-micron polyacrylic resin hardened layer, a second substrate layer 75-micron optical PET film, a 25-micron special polyacrylic adhesive layer and a 50-micron double-sided antistatic PET release film layer.
The special polyacrylic acid adhesive layer comprises the following raw materials in percentage by mass: 100 parts of acrylate adhesives, 10 parts of rosin tackifying resin, 1.5 parts of isophorone diisocyanate curing agent, 1.5 parts of epsilon-caprolactam closed isocyanate curing agent and 40 parts of organic solvent toluene.
The antistatic polyacrylic resin hardened layer is a bending-resistant antistatic polyacrylic resin hardened layer. The antistatic polyacrylic resin hardened layer comprises the following raw materials: 60 parts by weight of a solvent, 40 parts by weight of a resin, 0.6 part by weight of a photoinitiator, and 0.3 part by weight of a conductive high molecular polymer; the resin comprises polyester modified acrylic resin; the photoinitiator comprises 1-hydroxycyclohexyl phenyl ketone; the solvent includes PGM.
The antistatic acrylic pressure-sensitive adhesive protective layer comprises the following raw materials in percentage by mass: 100 parts of low-viscosity acrylate adhesive, 1.0 part of isophorone diisocyanate curing agent, 0.5 part of lithium bis (trifluoromethyl) sulfonyl imide and 30 parts of organic solvent toluene.
Example 3
The protective film adhesive tape for the flexible OLED support is of a multilayer structure and comprises a 75-micrometer optical PET film of a first base material layer, a 15-micrometer antistatic acrylic pressure-sensitive adhesive protective layer, a 3-micrometer antistatic polyacrylic resin hardened layer, a 100-micrometer optical PET film of a second base material layer, a 35-micrometer special polyacrylic adhesive layer and a 75-micrometer double-sided antistatic ionogenic film layer.
The special polyacrylic acid adhesive layer comprises the following raw materials in percentage by mass: 100 parts of acrylate adhesives, 15 parts of rosin tackifying resin, 2 parts of hexamethylene diisocyanate curing agent, 2 parts of methyl ethyl ketoxime blocked isocyanate curing agent and 60 parts of organic solvent ethyl acetate/toluene (1: 1).
The antistatic polyacrylic resin hardened layer is a bending-resistant antistatic polyacrylic resin hardened layer. The antistatic polyacrylic resin hardened layer comprises the following raw materials: 80 parts by weight of a solvent, 60 parts by weight of a resin, 1 part by weight of a photoinitiator, and 0.5 part by weight of a conductive high molecular polymer; the resin comprises polyurethane modified acrylic resin; the photoinitiator includes 2-hydroxy-2-methyl-1-phenylpropanone/1-hydroxycyclohexyl phenyl methanone ═ 1: 1; the solvent comprises MIBK.
The antistatic acrylic pressure-sensitive adhesive protective layer comprises the following raw materials in percentage by mass: 100 parts of low-viscosity acrylate adhesive, 2.0 parts of hexamethylene diisocyanate curing agent, 1.0 part of lithium bis (trifluoromethyl) sulfonyl imide and 50 parts of organic solvent ethyl acetate/toluene (1: 1).
Example 4
The protective film adhesive tape for supporting the flexible OLED has a multilayer structure and comprises a first substrate layer 50-micron optical PET film, a 10-micron antistatic acrylic pressure-sensitive adhesive protective layer, a 2-micron antistatic polyacrylic resin hardened layer, a second substrate layer 50-micron optical PI film, a 25-micron special polyacrylic adhesive layer and a 50-micron mPE double-sided antistatic film layer.
The special polyacrylic acid adhesive layer comprises the following raw materials in percentage by mass: 100 parts of acrylate adhesives, 10 parts of rosin tackifying resin, 1.5 parts of 2, 6-toluene diisocyanate curing agent, 1.5 parts of methyl ethyl ketoxime enclosed isocyanate curing agent and 40 parts of organic solvent butanone.
The antistatic polyacrylic resin hardened layer is a bending-resistant antistatic polyacrylic resin hardened layer. The antistatic polyacrylic resin hardened layer comprises the following raw materials: 60 parts by weight of a solvent, 40 parts by weight of a resin, 0.6 part by weight of a photoinitiator, and 0.3 part by weight of a conductive high molecular polymer; the resin comprises polyester modified acrylic resin; the photoinitiator comprises 1-hydroxycyclohexyl phenyl ketone; the solvent comprises MIBK.
The antistatic acrylic pressure-sensitive adhesive protective layer comprises the following raw materials in percentage by mass: 100 parts of low-viscosity acrylate adhesive, 2.0 parts of 2, 6-toluene diisocyanate curing agent, 0.5 part of lithium bis (trifluoromethyl) sulfonyl imide and 30 parts of organic solvent ethyl acetate.
The performance of the protective film adhesive tape of each of the above examples was tested and compared with a conventional type highly adhesive protective film adhesive tape, and the obtained data is shown in table 1 below:
TABLE 1
As can be seen from table 1, the protective film adhesive tape for supporting OLED of examples 1-4 of the present invention has excellent adhesiveness at room temperature, compared with the common acrylic adhesive tape, the adhesiveness of examples 1-4 is not decreased and slightly increased at a high temperature of 70 ℃, and the product is continuously crosslinked and the adhesiveness of the product is increased after the sealant is unsealed at a higher temperature, so that the risk of device damage caused by insufficient adhesiveness of the adhesive tape during the process of heat removal of the mobile phone screen or heat generation of the OLED device during use can be effectively prevented. Meanwhile, the surface hardening treatment of the base material and the design of the protective film prevent the parts from being damaged in the transportation and assembly processes. Through the antistatic treatment of the hardened layer, the antistatic treatment of the surface acrylic acid protective layer and the double-sided antistatic treatment of the release film, the excellent antistatic effect of the adhesive tape during use is ensured, and the OLED component is prevented from being damaged by excessive static voltage and the dust pollution component is prevented from being adsorbed.
In conclusion, the flexible protective film adhesive tape for supporting the OLED has excellent viscosity at normal temperature, the viscosity is improved by continuous crosslinking of the product at high temperature, a more excellent bonding effect is achieved, and the risk of device damage caused by insufficient viscosity of the adhesive tape in the process of heating the OLED device in use or thermally disassembling the screen of a mobile phone can be effectively prevented. Meanwhile, the adhesive tape is made of a PET (polyethylene terephthalate) base material with a certain thickness, bending-resistant hardening treatment is carried out on the surface of the base material, so that the adhesive tape can adapt to bending of flexible OLED at different angles, the stiffness of the whole component is ensured after the device is attached, and the component is prevented from being damaged, scratched and broken in the transportation and assembly processes. Through the antistatic treatment of the hardened layer, the antistatic treatment of the surface acrylic acid protective layer and the double-sided antistatic treatment of the release film, the excellent antistatic effect of the adhesive tape during use is ensured, and the OLED component is prevented from being damaged by excessive static voltage and the dust pollution component is prevented from being adsorbed.
In light of the foregoing description of the preferred embodiment of the present invention, many modifications and variations will be apparent to those skilled in the art without departing from the spirit and scope of the invention. The technical scope of the present invention is not limited to the content of the specification, and must be determined according to the scope of the claims.
Claims (9)
1. A flexible OLED supports and uses protection film sticky tape which characterized in that: from last down be first substrate layer, antistatic acrylic pressure sensitive adhesive protective layer, antistatic polyacrylic resin sclerosis layer, second substrate layer, special polyacrylic adhesive layer and the two-sided antistatic ionosphere rete of PET in proper order, the thickness of first substrate layer is 25-75 mu m, the thickness of antistatic acrylic pressure sensitive adhesive protective layer is 5-15 mu m, the thickness on antistatic polyacrylic resin sclerosis layer is 1 mu m-3 mu m, the thickness of second substrate layer is 50-100 mu m, the thickness of special polyacrylic adhesive layer is 15-35 mu m, the thickness of the two-sided antistatic ionosphere rete of PET is 25-75 mu m, wherein, special polyacrylic adhesive layer includes according to part by mass organic solvent 20-50, 100 parts of acrylic adhesive, tackifying resin 5-15.0 parts, isocyanate curing agent 0.5-2.0 parts, 0.5-3.0 parts of closed isocyanate curing agent.
2. The protective film tape for flexible OLED support according to claim 1, wherein: the antistatic acrylic pressure-sensitive adhesive protective layer comprises 100 parts of acrylate adhesives, 0.5-2.0 parts of isocyanate curing agents, 0.1-1.0 part of imine lithium salts and 20-50 parts of organic solvents in parts by mass.
3. The protective film tape for flexible OLED support according to claim 2, wherein: in the antistatic acrylic pressure-sensitive adhesive protective layer, the acrylate adhesive is a low-molecular-weight polymerized acrylate adhesive; the isocyanate curing agent is any one or more of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate; the imide lithium salt comprises bis (trifluoromethyl) sulfonyl imide lithium; the organic solvent comprises any one or a combination of ethyl acetate, n-butyl acetate, toluene and butanone.
4. The protective film tape for flexible OLED support according to claim 1, wherein: the antistatic polyacrylic resin hardened layer comprises 40-80 parts by weight of solvent, 20-60 parts by weight of resin, 0.3-1 part by weight of photoinitiator and 0.1-0.5 part by weight of conductive high molecular polymer.
5. The protective film tape for flexible OLED support according to claim 4, wherein: the solvent comprises any one or a combination of more of ethyl acetate, n-butyl acetate, toluene, MIBK or PGM; the resin comprises polyurethane modified acrylic resin or polyester modified polyacrylic resin; the photoinitiator comprises 2-hydroxy-2-methyl-1-phenyl acetone and/or 1-hydroxycyclohexyl phenyl ketone; the conductive high molecular polymer is a polythiophene polymer.
6. The protective film tape for flexible OLED support according to claim 1, wherein: the second substrate layer is an optical PET film or PI film, the transmittance is more than or equal to 90%, and the haze is less than 2%.
7. The protective film tape for flexible OLED support according to claim 1, wherein: the organic solvent comprises any one or a combination of more of ethyl acetate, n-butyl acetate, toluene and butanone; the acrylate adhesive comprises an acrylate copolymer with carboxyl or hydroxyl, and the molecular weight is 30-50 ten thousand; the tackifying resin comprises modified rosin resin with active carboxyl and double bonds; the closed isocyanate curing agent comprises a closed material and an isocyanate curing agent, wherein the closed material is any one or more of acetanilide, epsilon-caprolactam and methyl ethyl ketoxime; the isocyanate curing agent is any one or more of toluene diisocyanate, isophorone diisocyanate, hexamethylene diisocyanate and 4,4' -dicyclohexylmethane diisocyanate.
8. The protective film tape for flexible OLED support according to claim 1, wherein: the surface impedance value of the PET double-sided antistatic ionosphere film layer is 106-109Ω。
9. The protective film adhesive tape for supporting the flexible OLED as claimed in claim 1, wherein the preparation method comprises:
(1) mixing 20-50 parts by mass of organic solvent, 100 parts by mass of acrylate adhesive, 5-15.0 parts by mass of tackifying resin, 0.5-2.0 parts by mass of isocyanate curing agent and 0.5-3.0 parts by mass of closed isocyanate curing agent, and coating the mixture on one surface of a second substrate layer to obtain a special polyacrylic adhesive layer;
(2) mixing 40-80 parts by weight of solvent, 20-60 parts by weight of resin, 0.3-1 part by weight of photoinitiator and 0.1-0.5 part by weight of conductive high polymer, and coating the mixture on the other surface of the second substrate layer to obtain an antistatic polyacrylic resin hardened layer;
(3) coating 100 parts by mass of acrylate adhesives, 0.5-2.0 parts by mass of isocyanate curing agents, 0.1-1.0 part by mass of imine lithium salts and 20-50 parts by mass of organic solvents on the non-binding surface of the antistatic polyacrylic resin hardened layer to obtain an antistatic acrylic pressure-sensitive adhesive protective layer;
(4) attaching a first substrate layer to the non-attaching surface of the antistatic acrylic pressure-sensitive adhesive protective layer;
(5) and (3) attaching the PET double-sided antistatic ionotype film layer to the non-attaching surface of the special polyacrylic adhesive layer to prepare the flexible protective film adhesive tape for OLED support.
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| CN111394001B (en) * | 2020-04-28 | 2021-09-17 | 广东硕成科技有限公司 | High-pressure forming protective film for mobile phone back cover and preparation method thereof |
| CN112680135B (en) * | 2020-12-23 | 2022-12-06 | 苏州赛伍应用技术股份有限公司 | Support film for OLED module and preparation method thereof |
| CN112724852B (en) * | 2020-12-23 | 2023-04-18 | 宁波长阳科技股份有限公司 | OLED screen protective film and preparation method and application thereof |
| CN113637415A (en) * | 2021-06-09 | 2021-11-12 | 广东硕成科技有限公司 | Antistatic glass etching protective film and preparation method and application thereof |
| CN113773770B (en) * | 2021-09-27 | 2022-11-18 | 苏州世诺新材料科技有限公司 | Double-curing pressure-sensitive adhesive and preparation method of support film protective adhesive tape thereof |
| CN113861871A (en) * | 2021-10-08 | 2021-12-31 | 苏州久鋐电子有限公司 | Adhesive tape for fixing flexible circuit board |
| CN113930176B (en) * | 2021-11-03 | 2022-06-24 | 苏州久鋐电子有限公司 | Adhesive tape for fixing display |
| CN114716945A (en) * | 2022-04-22 | 2022-07-08 | 新纶电子材料(常州)有限公司 | 3D protective film, preparation method thereof and UV (ultraviolet) curing composition |
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